<head>
  <script src="./react/react@17.0.2.production.min.js"></script>
  <script src="./react/react-dom@17.0.2.production.min.js"></script>
  <script src="./react/material-ui@5.2.2.production.min.js"></script>
</head>
<body>
  <div class='react-root'></div>
  <script>
    window.e = React.createElement;
    window.reactRoot = document.querySelector('.react-root');
    window.renderComponent = c => ReactDOM.render(c, window.reactRoot);
  </script>
</body>
